Abstract: Objective: To establish an out-of-hospital Cardiopulmonary Resuscitation (CPR) training course for caregivers of patients at high risk of cardiac arrest, and to provide reference for the implementation of clinical patient education training. Methods: A mixed-methods research approach was employed, integrating literature review and the Delphi expert consultation method to develop a "psychological-theoretical-skills" CPR training course for family caregivers. Convenience sampling was employed to recruit 120 family caregivers of cardiac surgery patients from September to December 2024 as the study subjects. Participants were randomly assigned to the intervention group (n=60) and the control group (n=60). The experimental group received the out-of-hospital CPR training course constructed in this study, while the control group received the traditional education model. The differences in emergency response ability of the family caregivers anxiety status, nursing burden, and psychological resilience before and after the intervention were compared. Results: The training significantly improved family caregivers' theoretical scores [(32.45±3.35) vs (26.57±5.30)] and skill pass rates (80.0% vs 72.7%) in CPR (P<0.01), and the effect of the intervention group was better than that of the control group (P<0.01). Both training methods reduced anxiety and nursing burden and enhanced psychological resilience, but the improvement effects of the intervention group were more significant (P<0.01). Conclusion: The out-of-hospital CPR training course based on Delphi consultation can significantly improve the CPR first aid ability of family caregivers for patients at high risk of cardiac arrest, and effectively improve the psychological state of family caregivers.

Key words: Cardiopulmonary Resuscitation; out-of-hospital; family caregivers; training course; critical care nursing; safety; Delphi method